Photographic enlarging-camera.



PATENT-ED MAR. 17, 1908.

urmonron rln'snmmzs. 1904. V

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No. 881,997. PATBNTED MAR. 17, 1908. F. BR-OWNBLL.

PHOTOGRAPHIG ENLARGING CAMERA.

APP IOATION IIL D 45.1904.

L 3 JAN 5 SHEETS-SHEET 5.

} $11 wan oe QM A UNITED sTA-trns PATENT OFFICE.

FRANK A. BROWNELL, OF ROCHESTER, NEW YORK, ASSIGNOR 'lO EASTMAN KODAKCOMPANY, OF ROCl'liESlER, NEW YORK, A ('TORPO RATION OF NEW YORK.

PHOTOGRAPHIC EN LAB GIN G-CAMERA.

Specification of Letters Patent.

Patented March 1'7, 1908.

Application filed January 25, 1904. Serial No. 190,529.

5" new and useful Improvements in Photogra hic Enlarging-Cameras; and Ido hereby dec are the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, and to thereferonce-numerals marked thereon.

My present invention relates to photo graphic cameras and particularlysuch as are employed for making enlargements, from photographicnegatives or for making copies of negatives upon a smaller scale andadapting them for uses such as lantern slides or transparencies, and ithas for its object, to provide an apparatus that is capable of beingfolded into a small compass and which shall consist of few. parts thatare simple in construction and capable of being readily assembled.

My invention has for its further object to provide a camera in which.the negative holder may be adjusted relatively to the focusing screen orplate holder,- and the lens support is also capable of a movementrelatively to either of said holders, the necessary adjustment betweenthe different parts being indicated by scales provided with relativelyarranged indlces or characters which lndlcate the proper position. ofthe several parts to obtain the best results from a negative of a givensize. i

To these and other ends the invention 'consists in certain.lIIlPIOVGHlOH'lZS and combinations of parts, all as will be hereinaftermore fully described, the novel features being pointed out in the claimsat the end of the specification.

in the drawings: Figure 1 is a cross sectional view of an enlargingcamera constructed in arcorilaiive with my invention showing the partsin a collapsed or folded position. Fig. 2 is a side elevation thereof.portions of the frame being shown in section to better illnsl rate theconstruction of the parts. Fig. 3 is a horizontal sectional view takenon the line 1;" 3 of his. 2. Fig. 4 is an end elevati n similar to Fig.1, showing the applies-- tion of the plate holder to the rear of 'the'camera. Fig. 5 is a detail perspective view of the lens support, andFig. 6 is a cross sec-' tional view of the lens board taken on the line6 6 of Fig. -5. Fig. 7 is a detail sectional view taken on the line 7 7X of Fig. 2. Fig. 8 is a plan view similar to Fig. 3 illustrating amodified construction of the bed, and Fig. 9 is a longitudinal sectionalview taken on the line 9 9* of Fig. 8. Fi i is a sectional. view on theline 10 l0 of Fig. 8. Fig. 11 is a similar view taken on the line 11 11of Fig. 8. Fig. 12 is a view showing the front ortion of the cameraremoved and a suitab e lens mounted on the support toadapt a portion ofthe apparatus to be used as-anordinary camera. Fig. 13 is a sectionalview on the line13 13 .,.;of Fig. 3. 4

Similar reference numerals in.the several figures indicate similarparts.

In carrying out my invention I employ a hollow rectangular casingembodying the back 1 which forms a support for the plate holder and isnormally closed by a hinged door frame 2 containing the usual groundglass focusing screen 3. The front section 4 of the camera is hinged tothe section 1' at the point and is adapted. to be folded down into ahorizontal. position to, form the camera bed and support for thenegative and lens holders which are adjustable--relatively"to'" eachother and also to the focusing screen 3 as will he further described.When the camera is opened the section 4, forming the bed, is rotatedinto a horizontal position and the rear section 1 is held in a verticalposition by braces or arms 5", as will be understood from an inspectionof Figs. 2 and This bed section comprises the upwardly extending sidesor sli-rips 6 provided upon their proximate faceswith grooves orohannels forming ways in which is mounted an adjustable frameorextensible bed, formed of the side pieces 7 connected at their forwardends by'across piece 51 and at their opposite extremities by a similarpiece 9. At the inner sides of the strips 7 also provided grooves orUl'liLIlUGlS forming ways in which is supported a longitudinallyadjustable carriage 15, forming the base for the lens support '16 whi his arranged inter mediate the focusing screen 5, and the negative holder17, removably (l-OliIlGCtOd to the cross piece 8 on the extensibleportion of the bed by means of the clamping screw 18. As

provided with pins the carriage in its normal position is movedrearwardly to the inner end'of the bed 7, when not in use, the crosspieceIQ is cut away at its upper side and at its'rear edge is a stop 11against which the carriage is held by a leaf spring 12, the end of whichengages in recess 13, as will be understood.

The section 1 and the lens support is connected by the collapsiblebellows 19 and also arranged between said support and the negativeholder is a similar bellows 20, both of which are attached at theirouter ends to the section 1 and to the negative holder respectively andprovided at their inner or proximate ends with rectangular frames 21.22', adapted to be secured in suitable apertures formed in flanges 23attached to the lens support 16. These frames are also supplied at theirlower sides with headed projections 24 which are adapted to be engagedin the open ends of slots 25 provided in the adjustable plates 30 whichare movable transversely of the lens support, whereby the projections 24may be engaged therein to removably connect the frames 21 to saidsupport, as will be understood from the detail construction of the partsillustrated in Fig. 5.

In order to allow the section 4, comprising the extensible bed andcarrying the lens support carriage 15, to be folded as shown in Fig. 1,I form a movable connection between the carriage and the support whichin the present instance is shown as consisting of hinges 31 and to holdthe support, in its normal position, as shown in Fig. 2, I providethereon a pivoted bracket or bracing arm 32. The outer end 33 ofthenlatter is adapted to co6perate with a stop 34 on the carriage 15 andit is provided with a projection 35 adapted to engage in a suitablerecess formed in said stop. Also cooperating with the end of the arm isa spring 36 which operates to hold the bracket in engagement with thestop and to prevent the disengagement of the projection 35 so that whenit is desired to use the apparatus, .the lens support may be securelyheld in a vertical position.

'The lens boardillustrated particularly in Fig. 5 is rectangular and issecured in an aperture in the support 16, opposite sides of which areprovided with grooves adapted to receive tongues 38 on the lens boardwhereby it is reniovably secured in position. The relative height of theboard to the diameter of the said aperture is such that the board may beshifted verticallyto disengage the lower one of the tongues 38 to permitthe lower edge of the board to be tilted out-- wardly and the tongue atits upper edge removed, as will be understood, but when in its normalposition the board is held securely in position by means of a leafspring 39 ara central aperture in which is arranged a lens.40 and at oneside of the board the a Jerture is enlarged to form a recess and leadingfrom the lower side thereof is a groove or channel 45 in which is journaled the tubular shaft 46 carrying the apertured diaphragm or lensstop 47 and havingv at its outer end the operating handle 48. Extendingthrough the tubular shaftis a shaft 49 provided at its inner end with ashutter 50 and having its outer end bent to form the handle 51, arrangedin proximity to the handle 48 whereby the diaphragm or the shutter maybe operated either se arately or together.

In order to hold t e diaphragm and the shutter, when adjusted, either inthe open or closed position I provide the shaft 46 with moved backwardand forward between the negative holder and the focusing screen Iprovide the lens board with circuitous or tortuous passages open'mgthrough apertures 54, into the bellows 20 and connected by similar aertures 55 (indicated by dotted lines in I ig. 6) with the bellows 19,said apertures beingat opposite sides of a division wall or partition,so that the air may circulate freely from one bellows into anotherwithout the possibility of admitting light through said passages.

To facilitate an adjustment of the various parts of the apparatus theextensible bed is provided with a scale 60 with which cooperates afinger or pointer 61, on one of the sides 6 of the relativelystationaryportions of the bed, to indicate the relative positions of the negativeholder and the focusing screen,

and to clamp the beds together, I employ a binding screw 62. The lenssupport, which is independently movable u 011 theextensible bed, is alsoprovided wit a scale 63 00- operating with an index finger 64 on aclamping plate 65, having a downwardly projecting ed e, adaptedto engagein a groove 66, former in the carriage 15, and to secure the latter inadjusted position when the nut 67 is adjusted.

The scales 60 and 63 are provided with similar characterssuch as 3A, 4 5and X which indicate the relative positions assumed by the lens and thene ative holder when theseparts are adjusted to obtain an enlar ement ofa negative corresponding to sue characters on the scale, andforconvenience these index characters preferably indicate well knownsizes of photographic plates or negatives. These indices on the scalesalso hear a relationship to the size of the focusing screen 3 so thatwhen the bed and lens are in corresponding positions. of

or negative will beofsuch afsize as to be in; eluded. on said locusin'gscreen. For exalnple, if it is desired to enlarge a negativecorresponding in length and width to the size known as 3A it is securedin the holder 17 and the operator adjusts the extensible bed outwardlyuntil. the finger 61 registers with the said index on the scale 60, asshown in Figs. 3 and 8. The lens support 15 is also adjusted until thecorresponding index on the scale 63 registers with the finger 64 whenthe enlargement of the negative will be clear cut and just'includedwithin the limits of the substituted 'for the for-using screen 3 andsecured by the holders 7t) and the spring fingers 7i cooperating withthe pins 72 onthe holder. I

The parts may be collapsed by loosening the binding screwshl and 67 andmoving the extensible portion of the bed inwardly. then moving thecarriage 15to its innermost posi tion and disconnecting "the negativeholder by loosening the screw 1S.- The holder may then be insertedbetween the cross pieces 8 and 9 oi the extensible bed, and if thebracket 3'2 is then moved upon its pivot, into the position shown indotted lines in Fig. 5, the section 4- may be revolved upon its hinges 5and theeamera closed, shown in Figs. 1 and t. To hold the parts in thisposition the spring eatclies73 are provided upon the u per corners ofthe section. 1 which have t e outer forwardly extending perforated ends7 4 adapted to cooperate with pins 76 on the sectional In Figs. 8 and. 9I have shown a modification of the camera bed in which the base orsupport 4. is provided. with the upwardly extending sides 6 having thelower set of grooves or ways 80 in which is mounted a frame 81 adaptedto move rearwardly and carrying the rear section 1 of the camera.

The sides fi are each provided with an. upperset of grooves or ways 82arranged in alinement with similar grooves 82f formed irtth'e frame 81.and in which the longitudinally extension al bed 7 carrying the negativeholder 17 and the lens support 16, is adapted to slide. A clampingbolt'83 is provided for securing thevframe 81 in adjusted position and asimilar bolt 84, having at its inner end a plate 85 engaging the edge ofthe bed 7*, is

.also-provided-for securing the latter in, ad-

justed position. This ariangement is illustrated as showing aconve'nient 'neans ol providing telescopic or collapsing parts whereby agreater range of adjustment is pprniitted between the negative holderand the locusbig screen, or plate holder employed in lieu thereof, atthe rear side of section 1.

The ease with which the negative holder and the bellows 20 maybedetached admirably adapts. the remaining portion of the apparatus foruse as an ordinary camera and in Fig. 12 l-have so illustrated thedevice and have shown a lens tube 86 attached to a frame 87, similar tothe frames 21, and se cured to the lens support 16.

A camera. constructed in accordance with my invention consistsol' fewparts capable of being, easily formed and assembled. By arranging theparts as shown I am enabled to provide an apparatus that is admirablyadapted for the purposes specified and one in which the parts, whenfolded, are very compact. I

While I have confined the descripliion to the making of enlargements, itwill be under stood that reductions such lantern slides may be madedirectly from a larger negative. in which event the plate containing thenegative picture is mounted in place of the focusing screen 3 and theplate on which the posi tive picture is to be reproduced is supportedonthe holder 17 1 claim as my invention: v

1. In a photographic enlarging camera the combination with acasingcomprising pivotally connected front and rear sections and a bedadjustable longitudinally on the front section, of a holder for a plateor negative mounted on the outer end of the bed, a lens support alsomounted on the bed. and adjustable thereon between said holder and therear section and bellows arranged between and section and: adapted to becontained therein when not in use, a lens support adjustably .mounted onthe front section and adapted to .be contained in the rear section whennot in use and collapsible bellows arranged between the lens support andthe rear section-and the holder. I v

3. The combination with hingedfront and rearsectiona'a holder for aplate'or negative' zo;

mounted. on'the front section-andv an ad justable carriage arranged onthe latter, of a lens support pivoted to the carriage and bellowsarranged betweensaid support and the rear. section and the holder.

4. The combination with front and rear sections, hinges connecting themand a holder for a plate or negative nounted on one of the frontsections, of a carriage, a lens su'port.. and. hinges connecting thesupport ant carriage, means for adjusting the latter to move the hmgesinto approximate ahnement with the. pivoted centers of the hmgesconnectmg said front and rear sections and bellows connecting the lenssupport with the rear section and the holder.

5. The combination with front and rear sections, a lens support adaptedto be contained in the rear section and a bellows connecting ittherewith, of a carriage attached to the lens support and adjustablymounted on the front section, a holder for a plate or negative adaptedto be contained in the front section, means for supporting it in anupright position on .the latter and a bellows connecting the holder andlens support.

6. The combination with front and rear sections, a lens support adaptedto be contained in the rear section and a bellows'con necting ittherewith, of a carriage ivotally attached to the lens support andadjustably mounted on the front section, a brace arm between thecarriage and the support for maintaining the latter in operativeposition,

a holder for a plate or negative removably mounted on the front sectionand adapted to be contained therein and a bellows connecting the holderand the lens support.

7. The combination with front and rear sections, a lens support adaptedto be contained in the rear section and a bellows connecting ittherewith, ofacarriage pivotally attached to the lens support and 1-(justably a lens support mounted between the holder and screen, bellowsextending inwardly from ihe focusing screen and holder to the supportand provided at their inner ends with frames and locking devices(letachably connecting both of said frames to the lens support.

9. In a photographic camera the combination with a casing, a lenssupportand a bellows connecting them, of a frame attached to one end ofthe bellows and locking devices detaehably conneetmg the frame to thelens support.

' 10. In a photographic camera embodying a casing and a lens support, abellows arranged between the parts, a frame attached to the end ef thebellows and locking devices for detachably connecting it to thecontiguous part of the camera.

11. In a photographic camera the combination with a casmg formmg asupport for a focusing screen, a lens support and a bellows sense?arranged between said su ports, of a frame connected to the end of t ebellows and interlocking devices arrangedrespectivel ,on said frame andthe proximate support w ereby the bellows may be detached therefrom. 12.In a photographic camera the combination with a casing forming a supportfor a focusing screen, a lens. support and a bellows arranged betweensaid supports, of a frame attached to the bellows, Interlockingprojections between one edge of. the frame and the proximate support anda securing device on the latter cooperating with the opposite edge ofthe frame.

. 13. In a photographic camera, the combination with a casing, a lenssupport, and a bellows arranged between them, of a frame attached to theend of the bellows havin'g projections at its opposite edges, a deviceon the lens support engaging the projections at one side of the frameand a movable looking site side of said frame. V

14. In a photographic camera the combination with a casing, a lenssupport, and a bellows arran ed between them, of a frame attached-to theend of the bellows having projections at opposite sides an aperturedflange on the lens support adapted to receive the projections on oneside of the frame, and a movable. flange having open ended slots adaptedto receive the projections at the opposite sides of said frame.

15. In an enlarging camera the combination with a bed, a rear frame anda holder for a plate or negative, of a lenssupport arranged between saidframe and holder, bellows attached at their outer ends to both of the;latter and frames provided at their inner ends having projectionsthereon ,l'langes extending outwardly from the lens support and adaptedto receive the projections at one side of each of said frames, andmovable members on the support having open enrh d slots adapted toreceive the projections at the other side of each of said frames to re]nova bly secure them to the support.

16. In an enlarging camera the combination with a rear frame, and abedmovable relatively thereto, a holder for a plate or negative thereon andan adjustable lens support arranged between the rear frame respondingindex marks and separate pointers cooperating with said scales toindicate the relative positions of ai'ljustment of the holder and thelens support.

17. In an enlarging camera the combination with a rear frame. and a bedmovable relativelj' thereto. a. holder for a plate or negative. thereonand an adjustable lens support arranged between the rear frame andholder, of a scale and a 'poinlcrrm'iperaling therewith arranged toindicate the position of the bed, a second scale and pointer arandholder. of two scales provided with cor device cooperating with those atthe opporangmt to imilieate the position of the lens,

scale and pointer indicating the position of adjustment of the lenssupport, said scales being provided with corresponding and relativelyarranged index marks.

19.. In an enlarging camera the combination With-a rear frame, and a bedmovable relatively thereto, a holder for a plate or negative thereon anda lens support adjustably mounted on the bed, of a scale and pointerfor; indicatingthe relative adjustment of the bed on the frame and asecond scale and pointer indicating the position of adjustment of thelens support, said scales being provided with corresponding relativelyarranged index marks, designated by characters indicating regular sizesof plates or negatives that may be held inthe holder whereby the bedandlens s .ipport may be adjusted into the proper relative positions toeach other and to the rear frame.

20. In a photographic camera the combination with a casing, a bed'havingways and a lens carriageniovably supported thereon, of a scale on thecarriage and a clamping device on the bed adapted to engage the carriageand provided with an index finger coopcrating with the scale.

211 In a photographic enlarging camera the combination with a casingcomposed of a rear section and a front section having the side piecesforming ways, of an extensible bed provided with side pieces inovablysupported in said Ways and provided .with channels, a carriage supportedin the latter, a lens support mounted on the carriage, a holder for aplate or negative mounted on the bed'and bellows arranged between thelens support and the holder and rear section. 22. In a photographicenlarging camera the combination with a casing composed of a rearsection and a front section having side pieces forming-ways, of ahollow'extensible )ed comprisin the side pieces supported in the ways anprovided with channels, a carriage supported. .in the latter and a lenssup ort hinged to the carriage, aholder for a p ate or negative removaby mounted on the bed and adapted to be contained therein when -not inuse and bellowsextending betwe'enthe lens support and the rear sectionand holder, D 23. In a photographic enlarging camera the combinationwith a casing comprising a rear section and a front section hingedthereto and embodying the side portions having ways, a frame comprisingthe inner and outer ends and having side pieces inovably secured in theways and provided with channels of a stop on the inner end. of theframe, a carriage supported in said channelsand .a lens suport hinged tothe carriage, means for holding the latter in engagement with the stop,a holder for a plate or ne ative detachably be ows extending between thelens support and the rear section andv holder.

4. In a photographic enlarging camera, the combination with a casing, abed and a holder for a plate ornegative mounted thereon, of anadjustable lens support arranged between the casing and holder providedwith 25. In a photographic enlarging camera the combination with'acasing, a bed and a holder for a plate or negative arranged thereon, ofa lens support adjustably mounted between the casing and the holder andbellows connected at its opposite sides and connected to the casing andholder, a removable lens board mounted on the support and. provid edwith a tortuous air passage connecting the two bellows.

26. In a photographic enlarging camer'a the combination with a rearsection, a front section and a bed attached to the former and movablerearwardly on the latter, of for- Wardly extensible bed mounted on thefront section, a holder for a plate or negative carried on said bed, alens support arranged between the rear section and the holder andbellows connecting it with said parts.

supported on the outer on of the frame, and

' a tortuous air passage leading from one side 27. In a photographicenlarging camera the combination with a rear section, a front sectioncomprising a base having sides provided with two sets of ways and. a bedat taehed to the rear section and guided in one of said sets of ways, ofa forwardly extensible an extensible bed guided in the latter and aholder for a plate or negative arranged on said bed, a lens supportarranged between the rear sectlon and holder and bellows connectmg 1twith ls'aid parts.

29. In an enlarging camera, the combination with two beds having anadjustable sliding connection, a lens support adjustably mounted uponone of said. beds and supports for a negative and sensitized materialconnected to the respective beds, bellows con.-

necting one of said supports with the lens support, a separate bellowsdetachably connected to the latter and attached to the other support andconnections between said beds and supports permitting them to be foldedparallel into a flat package. l

30. In an enlarging camera, the combination with the two beds having anadjustable sliding connection, of a lens support a/djustably mountedupon one bed and hinged to fold substantially parallel therewith,supports for a negaiive'and for sensitized material, one of saidsupports being hinged to a bed to fold parallel therewith and the othersupport detachably connected to the other bed and a bellows connectingthe hinged support and lens support, said supports and beds beingarranged to extend in parallel planes when the camera is folded.

3]. In an enlarging camera, the combination with two beds, having anadjustable sliding connection, of a lens support adjustable along onebed and hinged to fold parallel therewith, a negative supportdetar-lmhtv section hinged. thereto, the supplemental bed sliding on thelatter, the lens support adjustable u on the supplemental bed and hingedto old parallel therewith, the negative support detachably connected tothe supplemental bed, the bellows connecting it with'the lens support,and the bellows connecting said lens support with the hollow back, theparts being so arranged that when one end of one'of the bellows isdisconnected the camera may be folded flat between the back and bedsection. 4

FRANK A. BROWN ELL. Witnesses G. WILLARD Rron,

RUssnLL B. GRIFFrrn.

